Baowee, is a singer from the southern Thai city of Trang
The subtitles of his, and other songs, have helped my Thai reading skills a lot!
Dtai Oratai has a beautiful voice, she also sings in the north-eastern dialect called 'Pasa Isaan' (the first video is in Central Thai though)
This one is definitely more 'Issan Style' Pasa Isaan is a version of the Laos language.
Sound similar to Thai and, indeed, shares some words, but there are differences.
Add some comments and links of your favourite Thai songs and I'll add them here too.